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181 lines
4.9 KiB
181 lines
4.9 KiB
/** @file
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SPCR table parser
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Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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@par Reference(s):
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- Microsoft Serial Port Console Redirection Table
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Specification - Version 1.03 - August 10, 2015.
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**/
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#include <IndustryStandard/Acpi.h>
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#include <IndustryStandard/SerialPortConsoleRedirectionTable.h>
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiTableParser.h"
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// Local variables
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STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
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/**
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This function validates the Interrupt Type.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateInterruptType (
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IN UINT8* Ptr,
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IN VOID* Context
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);
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/**
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This function validates the Irq.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateIrq (
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IN UINT8* Ptr,
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IN VOID* Context
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);
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/**
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An ACPI_PARSER array describing the ACPI SPCR Table.
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**/
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STATIC CONST ACPI_PARSER SpcrParser[] = {
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PARSE_ACPI_HEADER (&AcpiHdrInfo),
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{L"Interface Type", 1, 36, L"%d", NULL, NULL, NULL, NULL},
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{L"Reserved", 3, 37, L"%x %x %x", Dump3Chars, NULL, NULL, NULL},
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{L"Base Address", 12, 40, NULL, DumpGas, NULL, NULL, NULL},
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{L"Interrupt Type", 1, 52, L"%d", NULL, NULL, ValidateInterruptType, NULL},
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{L"IRQ", 1, 53, L"%d", NULL, NULL, ValidateIrq, NULL},
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{L"Global System Interrupt", 4, 54, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Baud Rate", 1, 58, L"%d", NULL, NULL, NULL, NULL},
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{L"Parity", 1, 59, L"%d", NULL, NULL, NULL, NULL},
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{L"Stop Bits", 1, 60, L"%d", NULL, NULL, NULL, NULL},
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{L"Flow Control", 1, 61, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Terminal Type", 1, 62, L"%d", NULL, NULL, NULL, NULL},
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{L"Reserved", 1, 63, L"%x", NULL, NULL, NULL, NULL},
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{L"PCI Device ID", 2, 64, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Vendor ID", 2, 66, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Bus Number", 1, 68, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Device Number", 1, 69, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Function Number", 1, 70, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Flags", 4, 71, L"0x%x", NULL, NULL, NULL, NULL},
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{L"PCI Segment", 1, 75, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Reserved", 4, 76, L"%x", NULL, NULL, NULL, NULL}
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};
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/**
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This function validates the Interrupt Type.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateInterruptType (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
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UINT8 InterruptType;
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InterruptType = *Ptr;
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if (InterruptType !=
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EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_INTERRUPT_TYPE_GIC) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: InterruptType = %d. This must be 8 on ARM Platforms",
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InterruptType
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);
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}
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#endif
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}
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/**
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This function validates the Irq.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateIrq (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
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UINT8 Irq;
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Irq = *Ptr;
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if (Irq != 0) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: Irq = %d. This must be zero on ARM Platforms\n",
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Irq
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);
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}
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#endif
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}
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/**
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This function parses the ACPI SPCR table.
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When trace is enabled this function parses the SPCR table and
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traces the ACPI table fields.
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This function also performs validations of the ACPI table fields.
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@param [in] Trace If TRUE, trace the ACPI fields.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] AcpiTableLength Length of the ACPI table.
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@param [in] AcpiTableRevision Revision of the ACPI table.
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**/
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VOID
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EFIAPI
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ParseAcpiSpcr (
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IN BOOLEAN Trace,
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IN UINT8* Ptr,
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IN UINT32 AcpiTableLength,
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IN UINT8 AcpiTableRevision
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)
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{
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if (!Trace) {
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return;
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}
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// Dump the SPCR
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ParseAcpi (
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TRUE,
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0,
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"SPCR",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (SpcrParser)
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);
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}
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